42664534 has 16 divisors (see below), whose sum is σ = 69956496. Its totient is φ = 19353600.

The previous prime is 42664513. The next prime is 42664547. The reversal of 42664534 is 43546624.

It is a super-2 number, since 2×42664534² = 3640524922874312, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42664534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11014 + ... + 14374.

It is an arithmetic number, because the mean of its divisors is an integer number (4372281).

Almost surely, 2^42664534 is an apocalyptic number.

42664534 is a deficient number, since it is larger than the sum of its proper divisors (27291962).

42664534 is a wasteful number, since it uses less digits than its factorization.

42664534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951.

The product of its digits is 69120, while the sum is 34.

The square root of 42664534 is about 6531.8093970966. The cubic root of 42664534 is about 349.4263637477.

The spelling of 42664534 in words is "forty-two million, six hundred sixty-four thousand, five hundred thirty-four".